Abaixo está uma instrução que descreve uma tarefa de geração de SQL, combinada com uma entrada que fornece mais contexto sobre os esquemas de tabela disponíveis. Escreva o código SQL que responda adequadamente à solicitação
 ###Instrução: Qual é o indicativo de chamada do Sonshine Radio Cotabato de 5kW?
 ###Tabelas: CREATE TABLE opinion_polling (opinion_polling_id AUTO_INCREMENT PRIMARY KEY, Date Released VARCHAR, Polling institute VARCHAR, Social Democratic VARCHAR, Socialist VARCHAR, Green-Communist VARCHAR, People's Party VARCHAR, Left Bloc VARCHAR, Lead VARCHAR) CREATE TABLE defensive (defensive_id AUTO_INCREMENT PRIMARY KEY, Player VARCHAR, Sacks INT, INT'S INT, Yards INT, Average INT, Long VARCHAR) CREATE TABLE head_coaching_history (head_coaching_history_id AUTO_INCREMENT PRIMARY KEY, Name VARCHAR, Years VARCHAR, Wins INT, Losses INT, Ties INT, Pct. INT) CREATE TABLE top_8_teams_qualified_for_team_finals (top_8_teams_qualified_for_team_finals_id AUTO_INCREMENT PRIMARY KEY, Position VARCHAR, Country VARCHAR, Floor INT, Pommel Horse INT, Rings INT, Vault INT, Parallel Bars INT, Horizontal Bar INT, Team Total INT) CREATE TABLE sonshine_radio_stations_in_the_philippines (sonshine_radio_stations_in_the_philippines_id AUTO_INCREMENT PRIMARY KEY, Branding VARCHAR, Callsign VARCHAR, Frequency VARCHAR, Power (kW) VARCHAR, Location VARCHAR)  
SELECT Callsign FROM sonshine_radio_stations_in_the_philippines WHERE Power (kW) = 5kw AND Branding = sonshine radio cotabato